Target::__construct() - Code Metrics - Inspection of "Refactoring log message format" - yiisoft/log - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#51)

by Evgeniy

created 2020-11-26 14:49 UTC

Target::__construct() A

↳ Parent: Target

Complexity

Conditions	1
Paths	1

Size

Total Lines	5
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	1

Importance

Changes

Metric	Value
cc	1
eloc	3
nc	1
nop	0
dl	0
loc	5
ccs	4
cts	4
cp	1
crap	1
rs	10
c	0
b	0
f	0

<?php

declare(strict_types=1);

namespace Yiisoft\Log;

use Psr\Log\InvalidArgumentException;
use Psr\Log\LogLevel;
use Yiisoft\Arrays\ArrayHelper;
use Yiisoft\VarDumper\VarDumper;

use function gettype;
use function implode;
use function in_array;
use function is_bool;
use function is_callable;
use function is_string;
use function microtime;
use function sprintf;

/**
 * Target is the base class for all log target classes.
 *
 * A log target object will filter the messages logged by {@see \Yiisoft\Log\Logger} according
 * to its {@see Target::setLevels()} and {@see Target::setCategories()}. It may also export
 * the filtered messages to specific destination defined by the target, such as emails, files.
 *
 * Level filter and category filter are combinatorial, i.e., only messages
 * satisfying both filter conditions will be handled. Additionally, you may
 * specify {@see Target::setExcept()} to exclude messages of certain categories.
 */
abstract class Target
{
    private MessageCategoryFilter $categories;
    private MessageCollection $messages;
    private MessageFormatter $formatter;

    /**
     * @var string[] list of the PHP predefined variables that should be logged in a message.
     *
     * Note that a variable must be accessible via `$GLOBALS`. Otherwise it won't be logged.
     *
     * Defaults to `['_GET', '_POST', '_FILES', '_COOKIE', '_SESSION', '_SERVER']`.
     *
     * Each element can also be specified as one of the following:
     *
     * - `var` - `var` will be logged.
     * - `var.key` - only `var[key]` key will be logged.
     * - `!var.key` - `var[key]` key will be excluded.
     *
     * Note that if you need $_SESSION to logged regardless if session
     * was used you have to open it right at he start of your request.
     *
     * @see \Yiisoft\Arrays\ArrayHelper::filter()
     */
    private array $logVars = ['_GET', '_POST', '_FILES', '_COOKIE', '_SESSION', '_SERVER'];

    /**
     * @var int How many log messages should be accumulated before they are exported.
     *
     * Defaults to 1000. Note that messages will always be exported when the application terminates.
     * Set this property to be 0 if you don't want to export messages until the application terminates.
     */
    private int $exportInterval = 1000;

    /**
     * @var bool|callable Enables or disables the current target to export.
     */
    private $enabled = true;

    /**
     * Exports log messages to a specific destination.
     * Child classes must implement this method.
     */
    abstract protected function export(): void;

    /**
     * When defining a constructor in child classes, you must call `parent::__construct()`.
     */
    public function __construct()
    {
        $this->categories = new MessageCategoryFilter();
        $this->messages = new MessageCollection();
        $this->formatter = new MessageFormatter();
    }

    /**
     * Processes the given log messages.
     *
     * This method will filter the given messages with levels and categories.
     * The message structure follows that in {@see MessageCollection::$messages}.
     * And if requested, it will also export the filtering result to specific medium (e.g. email).
     *
     * @param array $messages Log messages to be processed.
     * @param bool $final Whether this method is called at the end of the current application.
     */
    public function collect(array $messages, bool $final): void
    {
        $this->messages->addMultiple($this->filterMessages($messages));
        $count = $this->messages->count();

        if ($count > 0 && ($final || ($this->exportInterval > 0 && $count >= $this->exportInterval))) {
            if (($contextMessage = $this->getContextMessage()) !== '') {
                $this->messages->add(LogLevel::INFO, $contextMessage, [
                    'category' => MessageCategoryFilter::DEFAULT,
                    'time' => microtime(true),
                ]);
            }
            // set exportInterval to 0 to avoid triggering export again while exporting
            $oldExportInterval = $this->exportInterval;
            $this->exportInterval = 0;
            $this->export();
            $this->exportInterval = $oldExportInterval;
            $this->messages->clear();
        }
    }

    /**
     * Sets a list of log message categories that this target is interested in.
     *
     * @param array $categories The list of log message categories.
     *
     * @throws InvalidArgumentException for invalid log message categories structure.
     *
     * @return self
     *
     * @see MessageCategoryFilter::$include
     */
    public function setCategories(array $categories): self
    {
        $this->categories->include($categories);
        return $this;
    }

    /**
     * Sets a list of log message categories that this target is NOT interested in.
     *
     * @param array $except The list of log message categories.
     *
     * @throws InvalidArgumentException for invalid log message categories structure.
     *
     * @return self
     *
     * @see MessageCategoryFilter::$exclude
     */
    public function setExcept(array $except): self
    {
        $this->categories->exclude($except);
        return $this;
    }

    /**
     * Sets a list of log message levels that current target is interested in.
     *
     * @param array $levels The list of log message levels.
     *
     * @throws InvalidArgumentException for invalid log message level.
     *
     * @return self
     *
     * @see MessageCollection::$levels
     */
    public function setLevels(array $levels): self
    {
        $this->messages->setLevels($levels);
        return $this;
    }

    /**
     * Sets a list of the PHP predefined variables that should be logged in a message.
     *
     * @param array $logVars The list of PHP predefined variables.
     *
     * @throws InvalidArgumentException for non-string values.
     *
     * @return self
     *
     * @see Target::$logVars
     */
    public function setLogVars(array $logVars): self
    {
        foreach ($logVars as $logVar) {
            if (!is_string($logVar)) {
                throw new InvalidArgumentException(sprintf(
                    'The PHP predefined variable must be a string, %s received.',
                    gettype($logVar)
                ));
            }
        }

        $this->logVars = $logVars;
        return $this;
    }

    /**
     * Sets a PHP callable that returns a string representation of the log message.
     *
     * @param callable $format The PHP callable to get a string value from.
     *
     * @return self
     *
     * @see MessageFormatter::$format
     */
    public function setFormat(callable $format): self
    {
        $this->formatter->setFormat($format);
        return $this;
    }

    /**
     * Formats all log messages for display as a string.
     *
     * @return string
     */
    public function formatMessages(): string
    {
        $formatted = '';

        foreach ($this->messages->all() as $message) {
            $formatted .= $this->formatter->format($message);
        }

        return $formatted;
    }

    /**
     * Gets a list of log messages that are retrieved from the logger so far by this log target.
     *
     * @return array[] The list of log messages.
     *
     * @see MessageCollection::$messages
     */
    public function getMessages(): array
    {
        return $this->messages->all();
    }

    /**
     * Sets a PHP callable that returns a string to be prefixed to every exported message.
     *
     * @param callable $prefix The PHP callable to get a string prefix of the log message.
     *
     * @return self
     *
     * @see MessageFormatter::$prefix
     */
    public function setPrefix(callable $prefix): self
    {
        $this->formatter->setPrefix($prefix);
        return $this;
    }

    /**
     * Sets how many messages should be accumulated before they are exported.
     *
     * @param int $exportInterval The number of log messages to accumulate before exporting.
     *
     * @return self
     *
     * @see Target::$exportInterval
     */
    public function setExportInterval(int $exportInterval): self
    {
        $this->exportInterval = $exportInterval;
        return $this;
    }

    /**
     * Sets a date format for the log timestamp.
     *
     * @param string $format The date format for the log timestamp.
     *
     * @return self
     *
     * @see Target::$timestampFormat
     */
    public function setTimestampFormat(string $format): self
    {
        $this->formatter->setTimestampFormat($format);
        return $this;
    }

    /**
     * Sets a PHP callable that returns a boolean indicating whether this log target is enabled.
     *
     * @param callable $value The PHP callable to get a boolean value.
     *
     * @return self
     *
     * @see Target::$enabled
     */
    public function setEnabled(callable $value): self
    {
        $this->enabled = $value;
        return $this;
    }

    /**
     * Enables the log target.
     *
     * @return self
     *
     * @see Target::$enabled
     */
    public function enable(): self
    {
        $this->enabled = true;
        return $this;
    }

    /**
     * Disables the log target.
     *
     * @return self
     *
     * @see Target::$enabled
     */
    public function disable(): self
    {
        $this->enabled = false;
        return $this;
    }

    /**
     * Check whether the log target is enabled.
     *
     * @throws LogRuntimeException for a callable "enabled" that does not return a boolean.
     *
     * @return bool The value indicating whether this log target is enabled.
     *
     * @see Target::$enabled
     */
    public function isEnabled(): bool
    {
        if (is_bool($this->enabled)) {
            return $this->enabled;
        }

        if (!is_bool($enabled = ($this->enabled)($this))) {
            throw new LogRuntimeException(sprintf(
                'The PHP callable "enabled" must returns a boolean, %s received.',
                gettype($enabled)
            ));
        }

        return $enabled;
    }

    /**
     * Generates the context information to be logged.
     *
     * The default implementation will dump user information, system variables, etc.
     *
     * @return string The context information. If an empty string, it means no context information.
     */
    private function getContextMessage(): string
    {
        $result = [];

        foreach (ArrayHelper::filter($GLOBALS, $this->logVars) as $key => $value) {
            $result[] = "\${$key} = " . VarDumper::create($value)->asString();
        }

        return implode("\n\n", $result);
    }

    /**
     * Filters the given messages according to their categories and levels.
     *
     * The message structure follows that in {@see MessageCollection::$messages}.
     *
     * @param array[] $messages List log messages to be filtered.
     *
     * @return array[] The filtered log messages.
     */
    private function filterMessages(array $messages): array
    {
        foreach ($messages as $i => $message) {
            $levels = $this->messages->getLevels();

            if ((!empty($levels) && !in_array(($message[0] ?? ''), $levels, true))) {
                unset($messages[$i]);
                continue;
            }

            $category = (string) ($message[2]['category'] ?? '');

            if ($this->categories->isExcluded($category)) {
                unset($messages[$i]);
            }
        }

        return $messages;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Log;
6
7		use Psr\Log\InvalidArgumentException;
8		use Psr\Log\LogLevel;
9		use Yiisoft\Arrays\ArrayHelper;
10		use Yiisoft\VarDumper\VarDumper;
11
12		use function gettype;
13		use function implode;
14		use function in_array;
15		use function is_bool;
16		use function is_callable;
17		use function is_string;
18		use function microtime;
19		use function sprintf;
20
21		/**
22		* Target is the base class for all log target classes.
23		*
24		* A log target object will filter the messages logged by {@see \Yiisoft\Log\Logger} according
25		* to its {@see Target::setLevels()} and {@see Target::setCategories()}. It may also export
26		* the filtered messages to specific destination defined by the target, such as emails, files.
27		*
28		* Level filter and category filter are combinatorial, i.e., only messages
29		* satisfying both filter conditions will be handled. Additionally, you may
30		* specify {@see Target::setExcept()} to exclude messages of certain categories.
31		*/
32		abstract class Target
33		{
34		private MessageCategoryFilter $categories;
35		private MessageCollection $messages;
36		private MessageFormatter $formatter;
37
38		/**
39		* @var string[] list of the PHP predefined variables that should be logged in a message.
40		*
41		* Note that a variable must be accessible via `$GLOBALS`. Otherwise it won't be logged.
42		*
43		* Defaults to `['_GET', '_POST', '_FILES', '_COOKIE', '_SESSION', '_SERVER']`.
44		*
45		* Each element can also be specified as one of the following:
46		*
47		* - `var` - `var` will be logged.
48		* - `var.key` - only `var[key]` key will be logged.
49		* - `!var.key` - `var[key]` key will be excluded.
50		*
51		* Note that if you need $_SESSION to logged regardless if session
52		* was used you have to open it right at he start of your request.
53		*
54		* @see \Yiisoft\Arrays\ArrayHelper::filter()
55		*/
56		private array $logVars = ['_GET', '_POST', '_FILES', '_COOKIE', '_SESSION', '_SERVER'];
57
58		/**
59		* @var int How many log messages should be accumulated before they are exported.
60		*
61		* Defaults to 1000. Note that messages will always be exported when the application terminates.
62		* Set this property to be 0 if you don't want to export messages until the application terminates.
63		*/
64		private int $exportInterval = 1000;
65
66		/**
67		* @var bool\|callable Enables or disables the current target to export.
68		*/
69		private $enabled = true;
70
71		/**
72		* Exports log messages to a specific destination.
73		* Child classes must implement this method.
74		*/
75		abstract protected function export(): void;
76
77		/**
78		* When defining a constructor in child classes, you must call `parent::__construct()`.
79		*/
80	122	public function __construct()
81		{
82	122	$this->categories = new MessageCategoryFilter();
83	122	$this->messages = new MessageCollection();
84	122	$this->formatter = new MessageFormatter();
85	122	}
86
87		/**
88		* Processes the given log messages.
89		*
90		* This method will filter the given messages with levels and categories.
91		* The message structure follows that in {@see MessageCollection::$messages}.
92		* And if requested, it will also export the filtering result to specific medium (e.g. email).
93		*
94		* @param array $messages Log messages to be processed.
95		* @param bool $final Whether this method is called at the end of the current application.
96		*/
97	54	public function collect(array $messages, bool $final): void
98		{
99	54	$this->messages->addMultiple($this->filterMessages($messages));
100	50	$count = $this->messages->count();
101
102	50	if ($count > 0 && ($final \|\| ($this->exportInterval > 0 && $count >= $this->exportInterval))) {
103	8	if (($contextMessage = $this->getContextMessage()) !== '') {
104	8	$this->messages->add(LogLevel::INFO, $contextMessage, [
105	8	'category' => MessageCategoryFilter::DEFAULT,
106	8	'time' => microtime(true),
107		]);
108		}
109		// set exportInterval to 0 to avoid triggering export again while exporting
110	8	$oldExportInterval = $this->exportInterval;
111	8	$this->exportInterval = 0;
112	8	$this->export();
113	8	$this->exportInterval = $oldExportInterval;
114	8	$this->messages->clear();
115		}
116	50	}
117
118		/**
119		* Sets a list of log message categories that this target is interested in.
120		*
121		* @param array $categories The list of log message categories.
122		*
123		* @throws InvalidArgumentException for invalid log message categories structure.
124		*
125		* @return self
126		*
127		* @see MessageCategoryFilter::$include
128		*/
129	18	public function setCategories(array $categories): self
130		{
131	18	$this->categories->include($categories);
132	12	return $this;
133		}
134
135		/**
136		* Sets a list of log message categories that this target is NOT interested in.
137		*
138		* @param array $except The list of log message categories.
139		*
140		* @throws InvalidArgumentException for invalid log message categories structure.
141		*
142		* @return self
143		*
144		* @see MessageCategoryFilter::$exclude
145		*/
146	9	public function setExcept(array $except): self
147		{
148	9	$this->categories->exclude($except);
149	3	return $this;
150		}
151
152		/**
153		* Sets a list of log message levels that current target is interested in.
154		*
155		* @param array $levels The list of log message levels.
156		*
157		* @throws InvalidArgumentException for invalid log message level.
158		*
159		* @return self
160		*
161		* @see MessageCollection::$levels
162		*/
163	15	public function setLevels(array $levels): self
164		{
165	15	$this->messages->setLevels($levels);
166	9	return $this;
167		}
168
169		/**
170		* Sets a list of the PHP predefined variables that should be logged in a message.
171		*
172		* @param array $logVars The list of PHP predefined variables.
173		*
174		* @throws InvalidArgumentException for non-string values.
175		*
176		* @return self
177		*
178		* @see Target::$logVars
179		*/
180	27	public function setLogVars(array $logVars): self
181		{
182	27	foreach ($logVars as $logVar) {
183	7	if (!is_string($logVar)) {
184	6	throw new InvalidArgumentException(sprintf(
185	6	'The PHP predefined variable must be a string, %s received.',
186	6	gettype($logVar)
187		));
188		}
189		}
190
191	21	$this->logVars = $logVars;
192	21	return $this;
193		}
194
195		/**
196		* Sets a PHP callable that returns a string representation of the log message.
197		*
198		* @param callable $format The PHP callable to get a string value from.
199		*
200		* @return self
201		*
202		* @see MessageFormatter::$format
203		*/
204	8	public function setFormat(callable $format): self
205		{
206	8	$this->formatter->setFormat($format);
207	8	return $this;
208		}
209
210		/**
211		* Formats all log messages for display as a string.
212		*
213		* @return string
214		*/
215	12	public function formatMessages(): string
216		{
217	12	$formatted = '';
218
219	12	foreach ($this->messages->all() as $message) {
220	12	$formatted .= $this->formatter->format($message);
221		}
222
223		return $formatted;
224		}
225
226		/**
227		* Gets a list of log messages that are retrieved from the logger so far by this log target.
228		*
229		* @return array[] The list of log messages.
230		*
231		* @see MessageCollection::$messages
232		*/
233	37	public function getMessages(): array
234		{
235	37	return $this->messages->all();
236		}
237
238		/**
239		* Sets a PHP callable that returns a string to be prefixed to every exported message.
240		*
241		* @param callable $prefix The PHP callable to get a string prefix of the log message.
242		*
243		* @return self
244		*
245		* @see MessageFormatter::$prefix
246		*/
247	8	public function setPrefix(callable $prefix): self
248		{
249	8	$this->formatter->setPrefix($prefix);
250	8	return $this;
251		}
252
253		/**
254		* Sets how many messages should be accumulated before they are exported.
255		*
256		* @param int $exportInterval The number of log messages to accumulate before exporting.
257		*
258		* @return self
259		*
260		* @see Target::$exportInterval
261		*/
262		public function setExportInterval(int $exportInterval): self
263		{
264		$this->exportInterval = $exportInterval;
265		return $this;
266		}
267
268		/**
269		* Sets a date format for the log timestamp.
270		*
271		* @param string $format The date format for the log timestamp.
272		*
273		* @return self
274		*
275		* @see Target::$timestampFormat
276		*/
277	3	public function setTimestampFormat(string $format): self
278		{
279	3	$this->formatter->setTimestampFormat($format);
280	3	return $this;
281		}
282
283		/**
284		* Sets a PHP callable that returns a boolean indicating whether this log target is enabled.
285		*
286		* @param callable $value The PHP callable to get a boolean value.
287		*
288		* @return self
289		*
290		* @see Target::$enabled
291		*/
292	7	public function setEnabled(callable $value): self
293		{
294	7	$this->enabled = $value;
295	7	return $this;
296		}
297
298		/**
299		* Enables the log target.
300		*
301		* @return self
302		*
303		* @see Target::$enabled
304		*/
305	1	public function enable(): self
306		{
307	1	$this->enabled = true;
308	1	return $this;
309		}
310
311		/**
312		* Disables the log target.
313		*
314		* @return self
315		*
316		* @see Target::$enabled
317		*/
318	1	public function disable(): self
319		{
320	1	$this->enabled = false;
321	1	return $this;
322		}
323
324		/**
325		* Check whether the log target is enabled.
326		*
327		* @throws LogRuntimeException for a callable "enabled" that does not return a boolean.
328		*
329		* @return bool The value indicating whether this log target is enabled.
330		*
331		* @see Target::$enabled
332		*/
333	30	public function isEnabled(): bool
334		{
335	30	if (is_bool($this->enabled)) {
336	24	return $this->enabled;
337		}
338
339	7	if (!is_bool($enabled = ($this->enabled)($this))) {
340	6	throw new LogRuntimeException(sprintf(
341	6	'The PHP callable "enabled" must returns a boolean, %s received.',
342	6	gettype($enabled)
343		));
344		}
345
346	1	return $enabled;
347		}
348
349		/**
350		* Generates the context information to be logged.
351		*
352		* The default implementation will dump user information, system variables, etc.
353		*
354		* @return string The context information. If an empty string, it means no context information.
355		*/
356	8	private function getContextMessage(): string
357		{
358	8	$result = [];
359
360	8	foreach (ArrayHelper::filter($GLOBALS, $this->logVars) as $key => $value) {
361	8	$result[] = "\${$key} = " . VarDumper::create($value)->asString();
362		}
363
364	8	return implode("\n\n", $result);
365		}
366
367		/**
368		* Filters the given messages according to their categories and levels.
369		*
370		* The message structure follows that in {@see MessageCollection::$messages}.
371		*
372		* @param array[] $messages List log messages to be filtered.
373		*
374		* @return array[] The filtered log messages.
375		*/
376	54	private function filterMessages(array $messages): array
377		{
378	54	foreach ($messages as $i => $message) {
379	54	$levels = $this->messages->getLevels();
380
381	54	if ((!empty($levels) && !in_array(($message[0] ?? ''), $levels, true))) {
382	7	unset($messages[$i]);
383	7	continue;
384		}
385
386	54	$category = (string) ($message[2]['category'] ?? '');
387
388	54	if ($this->categories->isExcluded($category)) {
389	13	unset($messages[$i]);
390		}
391		}
392
393	54	return $messages;
394		}
395		}
396

yiisoft / log

Pull Request — master (#51)

Target::__construct() A

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